Improvement in heating-stoves



, 2 Sheets-Sheet 1. W; B. TREADWELL, I

HEATING-STOVE. .1 g 5Q1 Patented Nov. 2,1875.

2 Sheets-Sheet 2.

W. B. TREADWELL.

. HEATING-STOVE. No,169,601. Patented Nov. 2, 1875.

- Inventor N-PETERS, PHOTO-LITHOGRAPNER. WASHI NGTON, D. CI

UNITED STATES WILLIAM B. TREADWELL, OF ALBANY, NEW YORK.

IMPROVEMENT IN HEATING-STOVES.

Specification forming part of Letters Patent No. 169,601, dated November 2, 1875; application file October 15, 1875. V

To all whom it may concern 1 Be it known that I, WILLIAM B. TREAD- WELL, of the city and county of Albany, and State of New York, have invented certain new and useful Improvements in Heating-Stoves, particularly adapted to the burning of hituminous coals; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters. of reference marked thereon, forming a part of this specification, in which- Figures 1 and 2 are vertical central sections of stoves embodying my invention. Fig. 3 is a horizontal view on the plane of line m m, Fig. 1. Fig. 4 is a horizontal section on line at 'n, Fig. 1. Fig. 5 is a horizontal section onthe plane of line 10 19, Fig. 1. Fig. 6 is a semihorizontal section on line 0 0, Fig. 1.- Fig. 7 is a vertical section through the center 'of the upper portion of vvalve G on line a: m, Fig. 1. Fig. 8 is a vertical section through one of the descending hot-air flues a and chambers L and M. Fig. 9 is a horizontal section through the ash-pit.

Similar letters of reference. indicate correspondin g parts in the several figures.

In this invention the fire-chamber 0,.combustion-chamber E, magazine D, the mouth or lower portion j of the magazine, the feeddoor S, direct flue F at the front of the stove and over the fuel-reservoir, air-chamber L, and the outlet-pipe H, I place relatively to each other the same as shown in Patent No. 155,685, granted to me October 6, 1874:; but with a desire to produce a more perfect combustion I omit the inner plate, forming the mouth of the fuel-magazine in said patent, and, in place thereof, adopt the arrangement of plates hereinafter fully described, to form air passages or conduits o, p, and 8 below the mouth-of the reservoir. Said air passages or conduits enable me to carry warm atmospheric air deeply down into the midst of the burning fuel, from five to six inches deeper than was carried in the said patent above mentioned.

This mode of construction I find gives great- 1y superior results to any other hitherto known by me, and is due, I think, to the atmospheric air being supplied deeper into the mass of burning fuel, and not suffered to be driven off from the surface of the ignited fuel, as in the old methods of construction.

My invention consists, first, in constructing around the upper edge of the fire-pot, and at the back of the reservoir, a receiving and distributing hot-air-chamber, governed by a single valve; secondly, in combinationwith the above, the construction of deeply-penetrating air passages or conduits, by which a full supply of atmospheric oxygen shall be carried into the midst of the burning fuel; thirdly, in providing an expansion-chamber in the mica section of the stove, to facilitate the free distribution of caloric to the front of the stove, in order to heat the room better, and also to permit the products of combustion to pass easily, without crowding, into the descending flues K K 5 fourthly, in providing air-flues leading from the distributing air-chamber at the back of the magazine down to the ash-pit, to supply the fuel upon the grate with oxygen-the supply being governed by a valve, t, at the back of the firepot; fifthly, in providing a gate, valve, or damper, so arranged in the top of the stove as to govern the direct and the revertible drafts of the stove .sixthly, in the general arrangement in a base-burning stove of an open-work jacket at the lower front part of the fire-pot, so as to form an airheating chamber, and connecting the same by, a valve, t, to a distributing-ch amber, from whence the air is conveyed to the midst of the fire by deeply-penetrating conduits, and simultaneously under the grate, and regulating the passage of the products of combustion by a valve in the top of the stove, thereby producing a better heater, and a more economical user of coal.

In the accompanying drawings, A is the ash-pit, formed in the usual manner, and provided with hinged doors on each side, by which to clean out side flues K K- B is the basesection of the stove, divided by flue-strips q q into three flues-two side flues, 'I T, and one central return-flue, It-in the usual wellknown manner. 0 is the fire-chamber section,the jacket or outer casing of which is perforated or made of .latticed work on the PATENT OFFICE.

- same purpose.

front,. permitting atmospheric air to enter freely through said perforations or open-work b 71' into chamber M, surrounding the lower portion of the fire-pot, as shown in Figs. 1 and 6. Distributing-chamber L is construct ed at the rear of the combustion-chamber and the illuminating-sections of the stove, and at its lower part fills the entire circumference of the .stove. It is inclosed between plates 6 and e at the front, and r, y, and h at the back, as shown in Figs. 1, 2, 4., 5, and S. Said chamber L is constructed to hold in reserve warm atmospheric air in sufficient quantity for equal distributionat'points most remote from'the point of entrance. Air-passage p in front will be as wellsupplied as air-passage s at the rear of the stove. Plate 0 is so formed that the air must rise to point 0 before it can enter passage 10. (See Fig. 1.) Valve -t, at the bottom of chamber L, is to regulate the supply of air passing. into said chamber. Valve-'25 may be a sliding valve instead of a revolving valve, as shown, and serve the At each side of the stove, within theouter casing, aredescending flues K K, (shown in Figs. 4, 5, and 6,) extending from the illuminated section to the base, and connecting-there with bottom flues T T.

To. provide for the free expansion of the heat generated vby the burning fuel, and to c '0, as shown in Figs. 4., 5, 6, and 8. Openings ww lead from the top of air-chamber L into said air-flues. aa, as shown in Fig. 8. By means of flues a a the surplus of heated airis takenfrom the upper part of chamber ..L,- down through descending flue P, to the ash-pit,which it enters just forward of the back plate a, asshown. in Fig. 8. A projection, z, Figs. 1 and 3, is formed by expanding the top of the rear portion of the feed-cylinder section, to give more room for the natural deposit of soot and ashes, and to facilitate thefallingofthe same into the fire'pot be- 10w- 1n the top section, near outlet H, I construct a cut-off valve or gate, G, which I hang, asgates are often hung, by two. pivots or pins,k. and 7c. Said gate G is at the top of fine F,and;in chamber U of the top of the stove. It is made with its upper perpendicular portion fitted to close chamber U, and its lower inclined portion to. close entirely the passage up the projection z into the same chamber. There is, however,.a perforation in the lower, oblique portion of said valve G, of about one inch diameter, or sufficientlyv large 2 ieacoi to permit the constant escape of the surplus gases directly toward outlet H.

The'npper pin is of gate G is shielded from injury during transportation by being placed in a hollow or recess cast on the under side of the top plate of the stove, as shown in Fig. 1. Valve G is held shut by being driven upon a slightly and gradually inclined way in closing. Plate y is bolted to the fire-pot n, and plate y rests upon it, as shown in Fig. 1.

If desired, plates y and y may, in casting, be joined into one by the use of a divided pattern.

The upper part 3 of the fire-pot may be made. in one piece, and fitted within the top of the lower or body part, as shown in Fig. 2.

A second air-passage, 0, at the back of the stove, may be formed by making platerin two parts, 1' and r, and separating them, so as to form air-passage 0 above air-passage s, both of said passages 0 and s being below the mouth of the fnel-reservoir'D, as shown in Figs. land 2.

Plate it forms the rear wall of the air-oham bers L and M, and also divides or separates said chambers from back flue P.

When gate-valveG is open the products of combustion from the fire-chamber will pass directly upward through flue F over the top of reservoir D,and off into direct outlet-pipe H. With Valve G closed they will pass from the firechamber into the expansion-chamher, through flue-passages N N, and thence -to the rear of the stove; thence descending through side flues K K into the bottom or base B; thence passing forward through'the two side flues T T, they enter central flue R, and, passing through to the rear of the stove, ascend flue P into chamber U, and off through outlet-pipe H, as shown by arrows in Fig. 1.

The air to support combustion is admitted through the lattice or open work of the outer casing, as'at b b, in front of the fire-pot, into chamber M, surrounding the fire-pot n at its lower part. By opening valve t the warm air will pass into chamber L, and from thence be distributed through air passages or conduits p, s, and 0., thus introducing a full supply of oxygen deeply into the mass of ig nited fuel, inducing a more perfect combustion thereof, and thereby causing a greater and more uniform supply of heat.

- Having thus described my invention and its mode of operation, what I claim, and desire to secure by Letters Patent, is- 1. Plates h, r, and e, in combination with plates 0 and 1, and with fire-pot a, forming an air-distributing chamber, L, and extended air-passages p and s, and with valve 17, substantially as described, and for the purpose set forth.

2. Fire-pot n, rings 3 and y, in combina- I tion with plates 6, r, and 1', arranged and constructedin the manner and for the purpose herein set forth. '3. Illuminated or expansion chamber 01 fines N N, in combination with fines F, K, T, R, and P, substantially as herein described and shown.

4. Air-fines a a, in combination with airchamber L, valve t, and ash-pit B, all arranged and operating in the manner herein described.

5. Gate Gr, pivoted and constructed as herein shown, in combination with chamber U, flues F and K, and outlet H, as herein set forth.

6. Open-work jacket I) b, firepot n, airvalve t,'air-chamber L, air-flues 0, s, p, and a a, and magazine D, arranged, combined, and operating as and for the purpose herein described.

WILLIAM B. TREADWEIJL.

Witnesses:

ROBERT E. BULLOCK, JOHN HOUNGAN. 

